title: [On a research stay abroad].
authors.affiliation: Servicio de Medicina Interna II, Hospital Universitario de Salamanca, Salamanca, España. mmarcos@usal.es
authors.forename: M
authors.initials: M
authors.lastname: Marcos Martín
mesh_terms: D035843:Biomedical Research; D015510:Clinical Medicine; D005550:Foreign Medical Graduates; D008404:Massachusetts; D013030:Spain